Valve.



No. 853,274. PATENTED MAY 14, 1907 J. A. EILDEN.

- VALVE. APPLIQ AT ION FILED DEC. 6,1905.

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JAMES A. \TILDEN, or HYDE PARK, MASSACHUSETTS.

VALVE.

. are. 853,274.

Specification of Letters Patent,

JFatented May 14, 1.967.

Application filed December 6, 1905. Serial No. 290.64%

I To all whom/it may concern;

. Be it known that-I, JAMES A. TILDEN, a

*struction of such devices.

In the accompanying drawings, Figure 1 is atop plan view of one embodiment of my invention, the cap being removed; Fig. 2 is a full vertical, longitudinalsection on the line 2 -2 of Fig. 1, and Figs. 3 and 4 are enlarged sectional details on the lines 33 and 4-4,

res ectively, of Fig. 2. imilar characters indicate like part throughout the Several figures of the drawm s.

%4 casing of any convenient form is provlded with main flow openings 11 and 12, and with a hand opening 13.wh ich may be closed by a hollow dome-shaped cap or cover 14. One of the flowopenings is adapted to receive a-separable sleeve 1.5, having at its inner end an annular enlargement'16 for contact with a face 17 upon the casing, this serving to position the sleeve. Surrounding the inner end of the sleeve-opening. is an annular 1 surface 18 furnishing a seat about which ex' tends a preferably continuous depression 19. Through the enlargement, 16, conveniently at opposite sides, are passages 20 communieating with the depression. These passages are threaded and have portions Situated in alincment with openings 21 through the casing. Extending through the openings 21 into the passages 20 are tubular members 22'2 2 threaded to engage the seat portion. The outer end of each of these tubular members isprovided with a head 23 by which it may be turned, and each member may be locked in position by a nut 24 operating upon its threaded exterior and co-acting with a packing-ring 24 Situated between it and the casing. The outer ends of the tubes have internal threads at 25 to per'mitthe connection of suitable pipes. It-will be seen that the tubularmembers not only furnish passages connecting the seat depression with the atmosphere or some-point outside the easing but also'secure the seat-sleeve in place.

I extending from one side of the seat is a projection 25, there being two of these here plug illustrated situated side by side at the upper portion of the enlargement 16 below the cap. These projections or lugs are bored to receive a pivot-pin 26 about which may swingan arm 2-7. This arm carries the movable or gate portion of the valve, which is shown as in the form'of a disk 28 co-operating with the seat. The d sk may be secured between a plate 29 screwed upon a bolt 30 passing through an opening in the arm and having its head upon the opposite side, and a plate 31 surrounding the bolt'and locked by nu-ts32q The plate 29 is so positioned upon the bolt.

that it is somewhat loose in its relation to the arm, the resulting play of the disk and its securing elements allowing it to adjust itself with respect to the seat'to secure proper co operation. To lnsure the Seating of the gate, the arm is provided with a weight, which is illustrated as in the form of ahollow sphere 34 serving as a receptacle to' which access may be had through an open ng normally closed by a plug 3 The construction above described renders it possible to assemble andto truethe seat and body outside the casing, and, therefore with every part freely under the eye of the workman. As the dimensions of-these connected elements are too great with relation to the containing chamber in the casing to allow them to be put in place together, the sleeve may be first inserted and locked by the tubular members' Then the arm of the gate-is introduced between the projections 25 with the pivot openings opposite one another and the pin inserted through an alined opening 36 in the casing, the length of said pin being such asto enable this to be done conveniently; The opening 36 is then closed by a 37. whi thus allowing the valve to be madeup in a system either ri ht or left. I

When the valve is in use in a system in which a fluid acts against both faces the seat depression, being open to a point of less pressure than normally exists within the system, will give a differential pressure upon the gate which will be greatest at the side opposite the depression. This acts to maintain a closure of the valve, but when the pressure in the system for any reason decreases upon the outer face of the gate to an extent greater than that exerted by the combined pressuredifferential and the weight, the valve at once opens. It should be noted that as the One of the tubes 22 may be plugged .e pipe connection is made with the other,

weight swings upwardly into the p; P proaching avertical through the .pivot, its eflect decreases and it therefore offers less resistance. While the valve is open a limited flow will occur through the seat-depression and the retaining connection, thus giving an indication of the change of condition. This flow may also be applied to any suitable use. Whe'n normal'conditions are again established the weight promptly closes the valve, simultaneously shutting off the main flow and that through the differential-seat.

To control the eflect of the differential, the weight may be, varied. by placing shot or other small objects within the receptacle or removing those which have been previously supplied. I t Having thus described my invention, I

- claim:

l. A valve comprising a casing, a separable seat portion provided with a passage opening into he casing, and-a member eX- tending througa the easing into engagement.

' with the seat portion and beingadapted to 'thedepression to the outside oi the sleeve and being threaded at the latter point, and a tube extending through the casing and being threaded to cooperate with the sleeve-pas sage.

4'. A valve comprising a casmg, a separable seat portion provided with a depression,

and means for retaining the seat portion wlthln the casing, said retaining means being provided with a passage communicating with the depression.

5. A valve comprising a casing, .a separable seat portion provided with a depression, a gate portion mounted to move upon the seat portion, and means for retaining the seat portionwithin the casing, said retaining means being provided with a passage cornmunicating with the depression.

6. A valve comprising a casing having a differential seat portion, a gate portion 00- operatlng with the seat and belng pIOVKlQAl with a chamber, said chamber having an opening, and a closure for the opening;

7. A valve comprising a casing provided with an'opening, seat and gate portions separable from the casing, a pivot'connecting the seat and gate and terminating within the casing in alinement with its opening, and a removable closure-for the opening.

' Signed at Boston, in the county of Suffolk and State ofMassachusetts, this 29th day of November, 1.905.

JAMES A. TLI DEN \Vitnesses: i

FRANCIS llnnsn, HENRY l). Wm'rnns. 

